I just installed Bootleg onto the Steam version as well and had no music or sound effects. I chose FinalFan Tim OGG, which is OSTRe for FF7Music, but Bootleg didn't install it despite saying so in the logs. First time for everything I suppose. I extracted OSTRe.7z into the \FF7Music folder, configured FF7Music.exe to point to the OSTRe folder, and everything works fine again.
DraigoDrragon, see if that's the same issue you're having.